How to get connect with GIT-extension and fetch all the branch details using C#

Process gitProcess = new Process();

                gitProcess.StartInfo.FileName = // path for common batch file
                gitProcess.StartInfo.Arguments = "--login -i";
                gitProcess.StartInfo.CreateNoWindow = true;
                gitProcess.StartInfo.UseShellExecute = false;
                gitProcess.StartInfo.RedirectStandardOutput = true;
                gitProcess.StartInfo.RedirectStandardError = true;
                gitProcess.StartInfo.RedirectStandardInput = true;
                gitProcess.StartInfo.WorkingDirectory = selectedRepoOption;

                var output = new StringBuilder();
                string[] finaloutput;
                using (var outputWaitHandle = new AutoResetEvent(false))
                {
                    gitProcess.OutputDataReceived += (outputsender, e1) =>
                    {
                        // attach event handler
                        if (e1.Data == null)
                        {
                            outputWaitHandle.Set();
                        }
                        else if (e1.Data.EndsWith("xml"))
                        {
                            output.AppendLine(e1.Data + "#");
                        }
                    };